I'm looking to install an amplifier and want to run the power from the battery on the driver's side. Is there a hole in the firewall already there that I can use? Any place where I can get a diagram of the '05 Focus firewall?

Karl, June 2005

Thanks. I ended up drilling near the hood release and so far it seems to work well.

Karl, July 2005

If you open the hood, look up on the firewall on the drivers side. There is a big round looking object mounted there. That's your power brake booster. Usually there is a hole in the firewall really close to there which most of the wiring runs through to the interior under the dash.

Danny, June 2005